Freedom Calcs

Freedom Calcs is a free collection of educational financial independence and retirement calculators. It includes tools for Coast FIRE, Barista FIRE, Fat FIRE, Lean FIRE, and a FIRE number calculator.

The Coast FIRE calculator helps you estimate how much you need invested today so portfolio growth can carry you toward a later retirement target—without additional contributions. Enter your current age, retirement age, current invested assets (excluding your home and pre-retirement spending), annual retirement spending in today’s dollars, and an optional monthly contribution amount. You can then adjust key assumptions such as return, inflation, and a withdrawal rate to explore how different scenarios affect your results.

As you edit inputs, the calculator updates automatically and displays a growth/projection view, the Coast milestone, and comparisons across contribution paths (for example, keep contributing, contribute half, or stop now). All amounts are shown in today’s USD, using an inflation-adjusted (real) return framework. Contributions are modeled as being added at the end of each month.

Freedom Calcs is designed for learning and planning questions—not personalized financial advice. The methodology emphasizes inspectable formulas and model limitations, including the fact that outcomes depend on assumptions and exclude items like taxes, fees, market volatility, and post-retirement spending dynamics.

What does the Coast FIRE calculator estimate?

It estimates the amount you would need invested today so your portfolio can grow to a later retirement target using your chosen return, inflation, and withdrawal assumptions, without additional contributions.

What inputs do I need to run a Coast FIRE scenario?

You provide your current age and retirement age, your current invested assets for retirement, annual retirement spending in today’s dollars, and an optional monthly contribution. You can also adjust return, inflation, and withdrawal rate assumptions.

Does the calculator include my home, taxes, or investment fees?

Home value is excluded from invested assets for the calculator’s retirement-focused inputs. The model’s educational estimates also do not include taxes, fees, and market volatility in its results.

How does it handle inflation and returns?

It converts your nominal return and inflation assumptions into an effective real return, then uses that real return to discount the retirement target back to the Coast threshold in today’s USD.

Will contributions stop once I reach the Coast milestone in the projections?

No. In the contribution scenarios shown, each path continues through your retirement age. The scenarios are compared to show different outcomes under different contribution choices.

Are the calculator results guaranteed to be accurate or safe?

No. These are educational estimates based on assumptions and simplified modeling, so they cannot guarantee investment returns or retirement success.